linux-kernel - Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay override.

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Message-ID: <alpine.LSU.0.999.0801072316440.16143@be1.lrz>
Date:	Mon, 7 Jan 2008 23:27:21 +0100 (CET)
From:	Bodo Eggert <7eggert@....de>
To:	"H. Peter Anvin" <hpa@...or.com>
cc:	Bodo Eggert <7eggert@....de>,
	Christer Weinigel <christer@...nigel.se>,
	Ingo Molnar <mingo@...e.hu>,
	Alan Cox <alan@...rguk.ukuu.org.uk>,
	"David P. Reed" <dpreed@...d.com>,
	Rene Herman <rene.herman@...il.com>,
	Paul Rolland <rol@...917.net>, Pavel Machek <pavel@....cz>,
	Thomas Gleixner <tglx@...utronix.de>,
	linux-kernel@...r.kernel.org, Ingo Molnar <mingo@...hat.com>,
	rol@...be.net
Subject: Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay override.

On Mon, 7 Jan 2008, H. Peter Anvin wrote:
> Bodo Eggert wrote:

> > But overclocking is not the problem for udelay, it would err to the safe
> > side. The problem would be a BUS having < 8 MHz, and since the days of
> > 80286, they are hard to find. IMO having an option to set the bus speed
> > for those systems should be enough.
> > 
> 
> There might have been a few 386/20's clocking the ISA bus at ÷3
> (6.67 MHz) rather than ÷2 (10 MHz) or ÷2.5 (8 MHz).

Yes, and the remaining users should set the kernel option. Both of them.
The question is: How will they be told about the new kernel option?
-- 
A man inserted an advertisement in the classified: Wife Wanted."
The next day he received a hundred letters. They all said the
same thing: "You can have mine."